Should do governments make recycling mandatory? It is true that much effort is needed to encourage the citizens to recycle wastes. I fully agree that public authorities should stipulate laws and regulations to mandate them recycling. The key reason for regulating recycling is to enhance sustainability of our societies. For instance, recyclable wastes, such as papers, plastics and glass, are characterized as limited resources on the earth. If we continuously produce these materials without reusing and reproducing them, they will be exhausted. However, negative consequences will come out after a certain period of time, and people cannot see immediate impact on their lives, which disincentivize people to do recycling. Therefore, the legal requirement would be effective to encourage people for recycling. In particular, these measures would be important for school children to learn the importance of conserving environments.